from rest_framework import serializers


class StrictSerializer(serializers.Serializer):
    def validate(self, attrs):
        unknown_fields = set(self.initial_data) - set(self.fields)
        if unknown_fields:
            raise serializers.ValidationError(
                {field: ["Unexpected field."] for field in sorted(unknown_fields)}
            )
        return attrs


class ReservationCreateSerializer(StrictSerializer):
    name = serializers.CharField(max_length=200, trim_whitespace=True)
    email = serializers.EmailField()
    phone = serializers.CharField(max_length=40, trim_whitespace=True, required=False, allow_blank=True)
    party_size = serializers.IntegerField(min_value=1)
    notes = serializers.CharField(trim_whitespace=True, required=False, allow_blank=True)


class ReservationCreateResponseSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    status = serializers.CharField()
    performance = serializers.IntegerField(source="performance_id")
    party_size = serializers.IntegerField()
    message = serializers.CharField()


class ReservationConfirmSerializer(StrictSerializer):
    token = serializers.CharField(trim_whitespace=True, allow_blank=False)


class ReservationQRResponseSerializer(serializers.Serializer):
    reservation_id = serializers.IntegerField(source="reservation.id")
    qr_code_url = serializers.CharField()
    qr_code_image = serializers.CharField()


class ReservationConfirmResponseSerializer(serializers.Serializer):
    reservation_id = serializers.IntegerField(source="reservation.id")
    status = serializers.CharField(source="reservation.status")
    party_size = serializers.IntegerField(source="reservation.party_size")
    qr_code_url = serializers.CharField()
    qr_code_image = serializers.CharField()